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TENMA Model 72-7720/72-7725: OPERATING MANUAL

1. 31 TENMA Model 72 7720 72 7725 OPERATING MANUAL Maintenance 2 A Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears To replace battery 1 Disconnect the connection between the test leads and the circuit under test and move the test leads away from the input terminals of the Meter 2 Turn the Meter OFF 3 Remove the rubber feet and screws from the battery compartment and separate the battery compartment from the case bottom 4 Remove the battery from the battery compartment 5 Replace the battery with a new 9V battery NEDA 1604 or 6F22 or 006P 6 Rejoin the battery compartment and the case bottom and install the screw and rubber feet C Replacing the Fuses ANWarning To avoid electrical shock arc blast personal injury or damage to the Meter use specified fuses ONLY in accordance with the following procedure To replace the Meter s fuse 1 Disconnect the connection between the test leads and the circuit under test and move the test leads away from the input terminals of the Meter 2 Turn the Meter OFF 3 Remove the rubber feet and screws from the case bottom and separate the case bottom from the case top 4 Remove the fuse by gently prying one end loose and then take out the fuse from its bracket 32 TENMA Model 72 7720 72 7725 OPERATING MANUAL Maintenance 3 1
2. Install ONLY replacement fuses with the identical type and specification as follows and make sure the fuse is fixed firmly in the bracket 0 5A 250V fast type fuse 6 5x20mm 2 Rejoin the case bottom and the case top and install the screw and rubber feet Replacement of fuses is seldom required Burning of a fuse always results from the improper operation END This operating manual is subject to change without notice 33 TENMA Model 72 7720 72 7725 OPERATING MANUAL Tenma Test Equipment 405 S Pioneer Blvd Springboro Ohio 45066 www tenma com 34
3. readings that can lead to electric shock and personal injury Remove test leads test clips and temperature probe from the Meter and turn the Meter power off before opening the Meter case When servicing the Meter use only the same model number or identical electrical specifications replacement parts The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing No abrasive and solvent should be used to prevent the surface of the Meter from corrosion damage and accident The Meter is suitable only for indoor use Turn the Meter power off when it is not in use and take out the battery when not using for a long time Periodically check the battery as it may leak after some time If leakage is apparent the battery should be immediately replaced to prevent damage TENMA Model 72 7720 72 7725 OPERATING MANUAL International Electrical Symbols v AC Alternating Current coe DC Direct Current AC or DC Grounding n Double Insulated Deficiency of Built In Battery 1 Continuity Test Jr Diode C capacitance Test Fuse A Warning Refer to the Operating Manual C Conforms to Standards of European Union TENMA Model 72 7720 72 7725 OPERATING MANUAL The Multimeter Structure see figure 1 f
4. ANUAL Accuracy Specifications 4 H Capacitance Accuracy Overload 72 7720 72 7725 Protection 4 4 3049693 bsovAac 4 3 O 1uF 59 4 Remarks Testing signal approx 400Hz 40mV rms When the tested capacitor is greater than 30 uF reading is for reference only l Diodes and Continuity Test Range Resolution Input Protection Remark imV Open circuit 3 250V DC or AC lt A 10 continuously dd 30 TENMA Model 72 7720 72 7725 OPERATING MANUAL Maintenance 1 This section provides basic maintenance information including battery and fuse replacement instruction A Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration performance test and service information To avoid electrical shock or damage to the Meter do not get water inside the case A General Service Periodically wipe the case with damp cloth and mild detergent Do not use chemical solvent Toclean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings Turn the Meter OFF when it is not in use and take out the battery when not using for a long time Do not store the Meter in place of humidity high temperature explosive inflammable and strong magnetic field B Replacing the Battery see figure 11 Rubber foot Screw figure 11
5. C DC Current Measurement see figure 5 figure 5 A Warning Never attempt an in circuit current measurement where the open circuit voltage between terminals and ground is greater than 60V DC or 30V rms If the fuse burns out during measurement the Meter may be damaged or the operator may be injuerd Use proper terminals function and range for the measurement When test leads are connected to the current terminals do not place them in parallel across any circuit Model 72 7720 The DC current measurement has four measurement positions on the rotary switch 20 2mA 200mA and 20A Model 72 7725 The DC current measurement has three measurement positions on the rotary switch 20mA 200mA and 20A To measure current do the following 1 Turn off power to the circuit Discharge all high voltage capacitors 16 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 5 2 Insert the red test lead into the LAmA Model 72 7725 or 20A terminal and the black test lead into the COM terminal Set the rotary switch to an appropriate measurement position in A range Break the current path to be tested Connect the red test lead to the more positive side of the break and the black test lead to the more negative side of the break Turn on power to the circuit The measured value shows on the display Note If the value of current to be measured is unknown use the maximum measurement posi
6. Display 1999 Updates 2 3 times second Operating 0 C 40 C 32 F 104 F A0 C 50 C 14 F 122 F lt 75 0 C 30 C 5096 31 C 40 C 2000m 10000m 9V NEDA1604 or 6F22 or 006P Display d Display EI Display Display 1 165x80x38 3mm Approx 275g battery included IEC61010 CAT II 1000V overvoltage and double insulation standard TENMA Model 72 7720 72 7725 OPERATING MANUAL Accuracy Specifications 1 Accuracy t a reading b digits guarantee for 1 year Operating temperature 23 C 5 C Relative humidity lt 75 Temperature coefficient 0 1 x specified accuracy 1 C A DC Voltage Accuracy 72 7720 72 7725 Resolution 200mV 100uV Tmv 0 5 1 OmV 100mV V Remark Input impedance 10MQ B AC Voltage Accuracy 72 7720 72 7725 100uV 12 Resolution 0 8 3 Remarks Input impedance 10MQ Frequency response 40Hz 400Hz Display effective value of sine wave mean value response 27 TENMA Model 72 7720 72 7725 OPERATING MANUAL Accuracy Specifications 2 C DC Current Accuracy Overload Range i i ge Resolution 727720 727 7725 Protection 7777 0 5 250M Tu Remarks At20A Range For continuous measurement lt 10 seconds and interval not less than 15 minu
7. TENMA Model 72 7720 72 7725 OPERATING MANUAL Table of Contents Title Page Overview _ 3 Unpacking Inspection ze z a 4 Safety Information X m 5 Rules For Safe Operation a E 6 International Electrical Symbols 8 The Multimeter Structure 9 Functional Buttons se 10 Display Symbols 11 Measurement Operation 13 A DC Voltage Measurement 13 B AC Voltage Measurement 14 C DC Current Measurement 16 D AC Current Measurement 17 E Measuring Resistance 19 F Model 72 7725 Frequency Measurement 20 G Model 72 7725 Temperature Measurement 21 H Capacitance Measurement 22 Measuring Diodes amp Continuity 23 Testing for Continuity _ 24 Sleep Mode E 25 Turning on the Auto Display Backigh 25 General Specifications E 26 Accuracy Specifications 2 27 A DC Voltage a E 27 B AC Voltage 27 C DC Current 28 D AC Current 28 TENMA Model 72 7720 72 7725 OPERATING MANUAL Title Page E Resistance Test 29 E Model 72 7725 Frequency 29 G Model 72 7725 Temperature 29 H Capacitance 30 l Diodes
8. and Continuity Test 30 Maintenance n 31 A General Service 32 B Replacing the Battery 32 C Replacing the Fuses 32 TENMA Model 72 7720 72 7725 OPERATING MANUAL Overview AN warning To avoid electric shock or personal injury read the Safety Information and Rules for Safe Operation carefully before using the Meter Digital Multimeters Model 72 720 and 72 7725 hereafter referred to as the Meter are 3 1 2 digits with steady operations fashionable structure and highly reliable hand held measuring instrument The Meter uses large scale of integrated circuit with double integrated A D converter as its core and has full range overload protection The Meter not only can measure AC DC Voltage AC DC Current Resistance Capacitance Temperature Frequency Diodes and Continuity but also has Data Hold Full Icon Display and Sleep Mode features The Meter adopted advanced co injection technique in order to provide sufficient insulation and anti shaking In addition the Automatic Display Backlight feature enables user to work in a dim condition TENMA Model 72 7720 72 7725 OPERATING MANUAL Unpacking Inspection Open the package case and take out the Meter Check the following items carefully for missing or damaged parts English Operating Manual 1 piece Test Lead 1 pair Test Clip Point Contact Tem
9. being measured The buzzer sounds if the resistance of a circuit under test is less than 700 The LCD displays the resistance value of a circuit under test Note The LCD display 1 indicating the circuit being tested is open When continuity testing has been completed disconnect the connection between the testing leads and the circuit under test 24 TENMA Model 72 7720 72 7725 OPERATING MANUAL Sleep Mode To preserve battery life the Meter automatically turns off if you do not turn the rotary switch or press any button for approximately 10 minutes At that time the Meter consumes around 10uA current The Meter can be activated by pressing the POWER two times Turning on the Auto Display Backlight The Meter has a built in sensor Therefore the Display Backlight turns on and off automatically depending on the brightness of the environment 25 TENMA Model 72 7720 72 7725 OPERATING MANUAL General Specifications Maximum voltage between any Terminals and Ground A Fused Protection for mA Input Terminal 1000V rms 0 5A 250V fast type 65x20mm A Fused Protection for 20A Input Terminal Range Maximum Display Mesaurement Speed Temperature Storage Relative Humidity Altitude Operating Storage Battery Type Low Battery Data Hold Negative read Overload Dimensions HxWxL Weight Safety Compliances Certificate 26 Un fused Manual ranging
10. easure DC voltage connect the Meter as follows 1 Insert the red test lead into the VQ input terminal and the black test lead into the COM input terminal 2 Setthe rotary switch to an appropriate measurement position in V range 3 Connect the test leads across with the object being measured The measured value shows on the display 13 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 2 Note Ifthe value of voltage to be measured is unknown use the maximum measurement position 1000V and reduce the range step by step until a satisfactory reading is obtained TheLCD displays 1 indicating the existing selected range is overloaded it is required to select a higher range in order to obtain a correct reading in each range the Meter has an input impedance of approx10MO This loading effect can cause measurement errors in high impedance circuits If the circuit impedance is less than or equal to 10kQ the error is negligible 0 196 or less When DC voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test B AC Voltage Measurement see figure 4 black figure 4 AWarning To avoid harm to you or damage to the Meter from electric shock please do not attempt to measure voltage higher than 1000V or 750V rms although readings may be obtained 14 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measur
11. ehand and record the reading obtained called this reading as X X is the additional resistance from the test lead TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 8 For high resistance gt 1MQ it is normal to take several seconds to obtain a stable reading When there is no input for example in open circuit condition the Meter displays 1 When resistance measurement has been completed disconnect the connection between the testing leads and the circuit under test F Model 72 725 Frequency Measurement see figure 8 black figure 8 AWarning To avoid harm to you or damage to the Meter do not attempt to measure voltages higher than 60V in DC or 30V rms in AC although readings may be obtained When the frequency signal to be tested is higher than 30V rms the Meter cannot guarantee accuracy of the measurement The frequency measurement ranges are 2kHz and 20kHz To measure frequency connect the Meter as follows 1 Insert the red test lead into the VQ gt terminal and the black test lead into the COM terminal 2 Setthe rotary switch to an appropriate measurement position in KHz range 3 Connect the test leads across with the object being measured The measured value shows on the display 20 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 9 Note When Hz measurement has been completed disconnect the connection between the testin
12. ement Operation 3 Model 72 7720 AC voltage measurement has five measurement positions on the rotary switch 200mV 2V 20V 200V and 750V Model 72 7725 AC voltage measurement has four measurement positions on the rotary switch 2V 20V 200V and 750V To measure AC Voltage connect the Meter as follows 1 Insert the red test lead into the gt terminal and the black test lead into the COM terminal 2 Setthe rotary switch to an appropriate measurement position in V range 3 Connectthe test leads across with the object being measured The measured value shows on the display which is effective value of sine wave mean value response Note Ifthe value of voltage to be measured is unknown use the maximum measurement position 750V and reduce the range step by step until a satisfactory reading is obtained TheLCD displays 1 indicating the existing selected range is overloaded it is required to select a higher range in order to obtain a correct reading in each range the Meter has an input impedance of approx 10MQ This loading effect can cause measurement errors in high impedance circuits If the circuit impedance is less than or equal to 10kO the error is negligible 0 196 or less When AC voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test 15 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 4
13. g leads and the circuit under test G Model 72 7725 Temperature Measurement see figure 9 figure 9 AwWarning To avoid harm to you or damage to the Meter do not attempt to measure voltages higher than 60V in DC or 30V rms in AC although readings may be obtained The temperature measurement range is from 40 C 1000 or 40 F 1832 F To measure temperature connect the Meter as follows 1 Insert the red temperature probe into the V Sr terminal and the black temperature probe into the COM terminal 2 Set the rotary switch to C or F 3 Place the temperature probe to the object being measured The measured value shows on the display Note The Meter automatically displays the temperature value inside the Meter when there is no temperature probe connected 21 Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 10 Theincluded temperature probe may only be used for measurment up to 250 C For any mesaurement higher than that the rod type temperature probe must be used When temperature measeuremnet has been completed disconnect the connection between the testing leads and te circuit under test H Capacitance Measurement see figure 10 figure 10 Model 72 7720 Capacitance measurement has four measurement positions on the rotary switch 2nF 20nF 2uF and 100uF Model 72 7725 Capacitance measurement has four measurement positions on the rota
14. he black test lead to the more negative side of the break 5 Turn on power to the circuit The measured value shows on the display Note If the value of current to be measured is unknown use the maximum measurement position 20A and 20A terminal and reduce the range step by step until a satisfactory reading is obtained When current measurement has been completed disconnect the connection between the testing leads and the circuit under test 18 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 7 E Measuring Resistance see figure 7 black figure 7 ZNWarning To avoid damage to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before measuring resistance The resistance ranges are Model 72 7720 2000 2kQ 20kQ 200kQ 2MQ 20MQand 200MQ Model 72 7725 2000 2kQ 20kQ 200k 2MQ and 200MO To measure resistance connect the Meter as follows 1 Insert the red test lead into the VQterminal and the black test lead into the COM terminal 2 Set the rotary switch to an appropriate measurement position inQ range 3 Connect the test leads across with the object being measured The measured value shows on the display Note The test leads can add 0 1Qto 0 3Q of error to the resistance measurement To obtain precision readings in low resistance that is the range of 200Q short circuit the input terminals befor
15. igure 1 LCD Display Data Hold Button 9 Rotary Switch Other Input Terminals 5 COM Input Terminal 6 20A Input Terminal Model 72 7720 AmA Input terminal Model 72 7725 mA Input terminal Power TENMA Model 72 7720 72 7725 OPERATING MANUAL Functional Buttons The table below provides information about functional button operation Button Operation Performed Turn the Meter on and off Button Press down the POWER to turn on the Meter Press up the POWER to turn off the Meter Press HOLD once to enter hold HOLD mode Blue B Blus Butten Press HOLD again to exit hold mode In Hold mode ilis displayed and the present value is shown 10 TENMA Model 72 7720 72 7725 OPERATING MANUAL Display Symbols see figure 2 1 2 ne 4 Fur zn wama 10 14 PA mvoV 5 m um n Koo A VL figure 2 No Symbol Meaning 1 5 Dangerous Voltages 2 a The battery is low Z Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears Indicator for AC voltage or 3 current The displayed value is the mean value 4 Indicates negative reading 5 Diode test 6 Data hold is active T A The continuity buzzer is on 8 C Centigrade temperature 9 F Fahrenheit tempera
16. on around the connectors Inspect the test leads for damaged insulation or exposed metal Check the test leads for continuity Replace damaged test leads with identical model number or electrical specifications before using the Meter Do not apply more than the rated voltage as marked on the Meter between the terminals or between any terminal and ground The rotary switch should be placed in the correct position and no changeover of range shall be made during measurement to prevent damage of the Meter When working at an effective voltage over 60V DC or 30V rms AC special care should be taken for there is danger of electric shock Use the proper terminals function and range for your measurements Do not use or store the Meter in an environment of high temperature humidity explosive flammable and strong magnetic field The performance of the Meter may deteriorate after dampened When using the test leads keep your fingers behind the finger guards Model 72 7720 72 7725 OPERATING MANUAL Rules For Safe Operation 2 Disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity diodes capacitance or current Before measuring current check the Meter s fuses and turn off power to the circuit before connecting the Meter Replace the battery as soon as the battery indicator appears With a low battery the Meter might produce false
17. perature Probe 72 7725 onl 1 pair In the event you find items missing or damaged please contact your dealer immediately TENMA Model 72 7720 72 7725 OPERATING MANUAL Safety Information This Meter complies with the standards IEC61010 in pollution degree 2 overvoltage category CAT 11 1000V CAT 11 600 and double insulation CAT Il Local level appliance PORTABLE EQUIPMENT etc with smaller transient voltage overvoltages than CAT Ill CAT III Distribution level fixed installation with smaller transient overvoltages than CAT IV Use the Meter only as specified in this operating manual otherwise the protection provided by the Meter may be impaired In this manual a Warning identifies conditions and actions that pose hazards to the user or may damage the Meter or the equipment under test A Note identifies the information that user should pay attention to International electrical symbols used on the Meter and in this Operating Manual are explained on page 8 Model 72 7720 72 7725 OPERATING MANUAL Rules For Safe Operation 1 ZN warming To avoid possible electric shock or personal injury and to avoid possible damage to the Meter or to the equipment under test adhere to the following rules Before using the Meter inspect the case Do not use the Meter if it is damaged or the case or part of the case is removed Look for cracks or missing plastic Pay attention to the insulati
18. ry switch 20nF 200nF 2uF and 100uF To measure capacitance connect the Meter as follows 1 Insert the red test clip or red test lead into the VQ terminal and the black test clip or black test lead into the umA Model 72 7720 or mA Model 72 7725 terminal 2 Setthe rotary switch to an appropriate measurement position in Fcx range 3 Connect the test leads across with the object being measured The measured value shows on the display 22 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 11 Note When testing polarited capacitors connect the red test lead to anode amp black test lead to cathode Ifthe capacitor is shorted or the capacitor value is overloaded the LCD will display 1 To minimize the error the test lead should be as short as possible When the tested capacitor is greater than 30 uF reading is for reference only Itis normal to take a while for zeroing when changing the measurement range This process will not affect the accuracy of the final readings obtained Measuring Diodes amp Continuity A Warning To avoid damage to the Meter or to the equipment under test disconnect circuit power and discharge all high voltage capacitors before measuring diodes and continuity Testing Diodes Use the diode test to check diodes transistors and other semiconductor devices The diode test sends a current through the semiconductor junction and then mea
19. sures the voltage drop across the junction A good silicon junction drops between 0 5V and 0 8V To test out a diode out of a circuit connect the Meter as follows 1 Insert the red test lead into the VQ terminal and the black test lead into the COM terminal 2 Setthe rotary switch to 7 3 For forward voltage drop readings on any semiconductor component place the red test lead on the component s anode and place the black test lead on the component s cathode The measured value shows on the display 23 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 12 Note In acircuit a good diode should still produce a forward voltage drop reading of 0 5V to 0 8V however the reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips Connect the test leads to the proper terminals as said above to avoid error display The LCD will display 1 indicating open circuit for wrong connection The unit of diode is Volt V displaying the positive connection voltage drop value When diode testing has been completed disconnect the connection between the testing leads and the circuit under test Testing for Continuity To test for continuity connect the Meter as below 1 Insert the red test lead into VQ gt terminal and the black test lead into the COM terminal 2 Setthe rotary switch to f 3 Connect the test leads across with the object
20. tes Measurement voltage drop Full range at 200mV D AC Current Accuracy Overload Range 72 7720 727725 Protection 200uA O igA 0 5A 250V 1 3 mE f ast type 20mA 10uA F T 3 _ fuse 95x20 1004A 1 8 3 10 3 5 Un Fused Remarks At20A Range For continuous measurement lt 10 seconds and interval not less than 15 minutes Measurement voltage drop Full range at 200mV Frequency reaponse 40Hz 400Hz Display effective value of sine wave mean value response 28 TENMA Model 72 7720 72 7725 OPERATING MANUAL Accuracy Specifications 3 E Resistance Test Accuracy Overload Range Resolution 75755 72 7725 Protection 2000 0 10 0 8 3 12 250V DC 20kQ 100 9 1009 008 Jor AC rms 2MQ 1kQ 10 __ 1 2 200MQ 100kQ 596 reading 10 4 10 Remarks Open circuit voltage 700mV At 200MQ range it is approx 2 8V At 200MQ range test lead is in short circuit and it is normal to display 10 digits During measurement subtract the 10 digits from the reading F Model 72 7725 Frequency Range Resolution Accuracy Overload Protection 2kHz 1Hz 2 5 250V AC 20kHz 10Hz 1 5 5 Remarks Input Sensitivity 200mV G The Model 72 7725 Temperature Accuracy 29 TENMA Model 72 7720 72 7725 OPERATING M
21. tion 20A and 20A terminal and reduce the range step by step until a satisfactory reading is obtained When current measurement has been completed disconnect the connection between the test leads and the circuit under test AC Current Measurement see figure 6 figure 6 17 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 6 ZA Warning Never attempt an in circuit current measurement where the voltage between terminals and ground is greater than 60V If the fuse burns out during measurement the Meter may be damaged or the operator may be injured Use proper terminals function and range for the measurement When test leads are connected to the current terminals do not place them in parallel across any circuit Model 72 7720 The AC current measurement has five measurement positions on the rotary switch 200uA 2mA 20mA 200mA and 20A Model 72 7725 The AC current measurement has three measurement positions on the rotary switch 20mA 200mA and 20A To measure current do the following 1 Turn off power to the circuit Discharge all high voltage capacitors Insert the red test lead into thei AmA Model 72 7720 or mA Model 72 7725 or 20A terminal and the black test lead into the COM terminal 3 Setthe rotary switch to an appropriate measurement position in A range 4 Breakthe current path to be tested Connect the red test lead to the more positive side of the break and t
22. ture 10 pA mA A A Amperes amps The unit of current mA Milliamp 1 x 10 or 0 001 amperes uA Microamp 1x 10 or 0 000001 amperes 11 V Volts The unit of voltage mV Millivolt 1 x 10 or 0 001 volts 11 TENMA Model 72 7720 72 7725 OPERATING MANUAL Display Symbols see figure 2 No Symbol Meaning 12 nF pF F Farad The unit of capacitance uF Microfarad 1 x 10 or 0 000001 farads nF Nanofarad 1 x 10 or 0 000000001 farads 13 kHz The unit of frequency in cycles second Kilohertz 1 x 10 or 1 000 hertz Q Ohm The unit of resistance 14 GKOMO o 1 x 10 or 1000 ohms Megaohm 1 x 10 or 1 000 000 ohms 12 TENMA Model 72 7720 72 7725 OPERATING MANUAL Measurement Operation 1 Make sure the Sleep Mode is not on if you found there is no display on the LCD after turning on the Meter Make sure the Low Battery Display Jis not on otherwise false readings may be provided Pay extra attention to the N symbol which is located besides the input terminals of the Meter before carrying out measeurement A DC Voltage Measurement see figure 3 black figure 3 AWarning To avoid harm to you or damage to the Meter from electric shock please do not attempt to measure voltage higher than 1000V or 750V rms although readings may be obtained The DC Voltage ranges are 200mV 2V 20V 200V and 1000V To m

TENMA Model 72-7720/72-7725: OPERATING MANUAL

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